Integrate Dynamics 365 CRM <= 1.1.1 - Authenticated (Administrator+) Stored Cross-Site Scripting via Field Mapping Configuration

This research plan outlines the process for investigating and exploiting CVE-2026-0725, a Stored Cross-Site Scripting (XSS) vulnerability in the Integrate Dynamics 365 CRM plugin.

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1. Vulnerability Summary

The Integrate Dynamics 365 CRM plugin (<= 1.1.1) fails to properly sanitize and escape field mapping configurations within its administrative settings. An attacker with Administrator-level privileges can inject arbitrary JavaScript into these configuration fields. Because the plugin displays these configurations on the settings page without sufficient output escaping, the script executes whenever an administrator (or any user accessing the mapping settings) views the page.

2. Attack Vector Analysis

• Endpoint: The vulnerability is likely located within the plugin's administrative settings menu, specifically the "Field Mapping" section.
• Vulnerable Action: Saving or updating the field mapping configuration. This typically involves a POST request to wp-admin/options.php (if using the Settings API) or wp-admin/admin-ajax.php (if using a custom AJAX handler).
• Vulnerable Parameter: Parameters related to mapping labels, CRM field names, or WordPress field keys (e.g., mapping_label, crm_field, etc.).
• Authentication: Requires Administrator or higher privileges (manage_options capability).
• Preconditions: The plugin must be active and the attacker must have access to the plugin's settings page.

3. Code Flow (Inferred)

1. Entry Point: The administrator navigates to the plugin's settings page, typically registered via add_menu_page or add_submenu_page with a slug like integrate-dynamics-365-crm-settings.
2. Data Submission: The user submits a form to save field mappings.
   • If using Settings API: admin-init hook calls register_setting().
   • If using AJAX: wp_ajax_save_mapping (inferred) is triggered.
3. Storage: The plugin calls update_option('dynamics_crm_mappings', ...) (inferred) without using sanitize_text_field() or wp_kses() on the mapping attributes.
4. Retrieval & Sink: When the settings page is reloaded, the plugin calls get_option('dynamics_crm_mappings'). The retrieved data is echoed into the HTML (e.g., inside an <input> value attribute or a <td> cell) without using esc_attr() or esc_html().

4. Nonce Acquisition Strategy

Since this is an administrative settings vulnerability, a WordPress nonce will be required to authorize the POST request.

1. Identify the Page: Navigate to the Field Mapping page (likely wp-admin/admin.php?page=integrate-dynamics-365-crm-mappings (inferred)).
2. Locate Nonce: Use browser_navigate to load the settings page.
3. Extract Nonce: Use browser_eval to find the nonce field in the form.
   • Common identifiers for settings forms: document.querySelector('input[name="_wpnonce"]')?.value.
   • If AJAX-based: Look for localized objects, e.g., window.dynamics_crm_settings?.nonce.

5. Exploitation Strategy

The goal is to inject a payload that executes when the settings page is viewed.

Step 1: Discover the Mapping Endpoint
The agent must first find the exact menu slug and the form structure.

• wp admin-menu list
• browser_navigate to the mapping page and inspect the HTML form attributes (ID, Action, Method).

Step 2: Craft the Payload
Since the payload is likely rendered inside an input field or a table:

• "><script>alert(document.domain)</script>
• " onmouseover="alert(1)

Step 3: Execute the Injection
Submit the malicious configuration via http_request.

• URL: https://[target]/wp-admin/options.php (or the identified AJAX endpoint).
• Method: POST
• Headers: Content-Type: application/x-www-form-urlencoded
• Body (Inferred):

  option_page=dynamics_crm_settings_group&
  action=update&
  _wpnonce=[EXTRACTED_NONCE]&
  dynamics_crm_mappings[0][label]=<script>alert(1)</script>&
  dynamics_crm_mappings[0][wp_field]=user_login&
  dynamics_crm_mappings[0][crm_field]=contactid
  

Step 4: Trigger the XSS
Navigate back to the field mapping settings page using browser_navigate.

6. Test Data Setup

1. Install Plugin: Ensure integrate-dynamics-365-crm version 1.1.1 is installed and active.
2. User: Create an administrator user.
3. Plugin Setup (If required): Some CRM plugins require a dummy API key or URL to be saved before the mapping section becomes accessible. Use wp option update to set a dummy CRM endpoint if needed.

7. Expected Results

• The POST request should return a 302 Redirect (Settings API) or a 200 OK (AJAX).
• When navigating to the settings page, the browser should trigger the alert(document.domain) popup.
• The HTML source of the page should contain the raw, unescaped payload within the mapping configuration table or form.

8. Verification Steps

1. Check Database: Use WP-CLI to verify the payload is stored.
   • wp option get dynamics_crm_mappings --format=json (Verify the injected string exists in the output).
2. Verify Context: Check if the XSS is limited to the Admin dashboard (Self-XSS) or if it propagates to public-facing forms (e.g., a shortcode-generated lead form).
   • grep -r "get_option.*dynamics_crm_mappings" . to see if the mappings are used in the frontend.

9. Alternative Approaches

• CSRF Chain: If the nonce check is weak or missing (unlikely for admin settings but possible), the XSS could be delivered via a CSRF attack against an administrator.
• Attribute Breakout: If esc_html is used but esc_attr is not, try breaking out of a value attribute: value='[PAYLOAD]' using ' onclick='alert(1).
• JSON Breakout: If the settings are localized into a script block via wp_localize_script, use ";alert(1);// to break out of the JavaScript variable assignment.